try to migrate to nix

nix/common.nix

@@ -0,0 +1,56 @@
+{  pkgs
+, ...
+}:
+{
+	system.stateVersion = "24.05";
+
+	users.mutableUsers = false;
+
+	nix.gc = {
+		automatic = true;
+		dates = "weekly";
+	};
+
+	networking = {
+		firewall = {
+			enable = true;
+			allowedTCPPorts = [ 80 443 ];
+		};
+	};
+
+	nix.settings.experimental-features = [ "nix-command" "flakes" ];
+	environment.systemPackages = with pkgs; [
+		curl
+		neovim
+		bash
+		git
+
+		zip unzip
+		xz
+		zstd
+		gnutar
+
+		diffutils
+		file
+		tree
+		gnused
+		gnugrep
+		stow
+
+		killall
+		gnupg
+	];
+
+	programs = {
+		neovim.enable = true;
+		neovim.defaultEditor = true;
+
+		git = {
+			enable = true;
+			lfs.enable = true;
+			config = {
+				init.defaultBranch = "main";
+			};
+		};
+	};
+}